Three women were arrested in Patchogue Thursday and charged with illegal activities at an illegitimate massage parlor, Suffolk police said.

Ashley Jimenez, 26, of Ridge, and Dawn Collins, 23, of Central Islip, were both charged with unlicensed practice of the massage therapist profession, and with prostitution. Justine Rittman, 26, of St. James, was charged with criminal possession of a controlled substance.

Fifth Precinct officers conducted an undercover investigation at the massage parlor, in a second-floor apartment at 305A West Roe Blvd., in Patchogue, and made the arrests shortly after 4 p.m., police said.

The three women were to be arraigned Friday in First District Court, Central Islip.